Which of the following is a Lewis acid ? from Chemistry NEET Yea

Subject

Chemistry

Class

NEET Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

11.

Which of the following is a wrong statement ? In a given period of the Periodic Table, the s-block element has, in general, a higher value of

  • electronegativity

  • atomic radius

  • ionisation energy

  • electron affinity


12.

What is the H of the reaction?

CH2Cl2 (g) C (g) + 2H (g) + 2Cl (g)

The average bond energies of C-Cl bond and C-H bond are 416 kJ and 325 kJ mol-1 respectively.

  • 1482 kJ

  • 1482 J

  • 1492 kJ

  • 1492 J


Advertisement

13.

Which of the following is a Lewis acid ?

  • OH-

  • H+

  • F-

  • NH3


B.

H+

Lewis acid is any substance that can accept a pair of non- bonding electrons, such as the H+ ions. It is an electron pair acceptor.

Lewis base is any substance that can donate a pair of electrons.

OH-, F- and NH3 are Lewis base because they can donate a lone pair of electrons while H+ is a Lewis acid because it can accept a lone pair of electrons.


Advertisement
14.

The bond length of HCl bond is 2.29 x 10-10 m. The percentage ionic character of HCl, if measured dipole moment is 6.226 x 10-30 C- m, is

  • 8%

  • 20%

  • 17%

  • 50%


Advertisement
15.

The only o  p-directing group which is deactivating in nature is

  • -NH2

  • -OH

  • -X(halogens)

  • -R(alkyl groupd)


16.

Which of the organic compounds will give red colour in Lassaigne test ?

  • C6H5NH2

  • None of these


17.

CaC2 and H2O react to produce

  • CH4

  • C2H4

  • C2H2

  • C2H6


18.

The IUPAC name of the following compound is

 

  • 1, 2-dimethyl-2-butenol

  • 3-methylpent-3-en-2-ol

  • 3, 4-dimethyl-2-buten-4-ol

  • None of the above


Advertisement
19.

Ammonia gas can be dried over

  • CaCl2

  • conc. H2SO4

  • P2O5

  • quick lime


20.

Inorganic benzene is

  • B3N6H3

  • B3N3H6

  • Al3N3H6

  • None of these


Advertisement